Are we talking about standard java.io.FileReader? Won’t work, but it’s not hard without it.
/src/main/resources maven directory contents are placed in the root of your CLASSPATH, so you can simply retrieve it using:
InputStream is = getClass().getResourceAsStream("/storedProcedures.sql");
If the result is not null (resource not found), feel free to wrap it in a reader:
Reader reader = new InputStreamReader(is);